Reasonable pruning is the main measure for high yield of cowpea. The lateral branches below the first inflorescence are removed as long as 3 cm to ensure that the main stem is thick; the lateral branches above the first inflorescence remain 1-2 leaves topping; when the main vine spreads to the roof, the top is picked to control the growth and promote the lower part. Lateral branches form flower buds. Kidney bean flowering and scab phase to consume a lot of nutrients, higher requirements for fertilizer and water, should be enough water, timely heavy fertilizer, fertilizer can be applied per acre 30 kg, 10 kg superphosphate, potassium sulfate 5 kg. After the vigorous growth of soybean meal, more fertilizer is needed. Top phosphate fertilizer should be applied once again and Mg superphosphate 10 kg. After the flood season, if the plants can continue to grow, fertilizer and water management should be strengthened to promote lateral branch germination, promote flower turning, and flower buds on inflorescences that have been harvested continue to bloom and scab, extend the harvest period, and increase cowpea production. Kidney beans are racemes. Each inflorescence has 2-5 pairs of flowers, usually only a pair of pods, with sufficient fertilizer and water, good management, and when all the flowers grow well, all the flowers can grow. After the first soybean pod is harvested, the second pair of flower buds is set or fruited. Therefore, it is necessary to carefully harvest and not to injure or knock off the flower buds on the inflorescence to increase the number of pods and increase the yield. After 10-12 days of flowering, the pods are full and the seeds can be harvested when they are not present. Take care not to damage flower buds when harvesting.